# NTSB CHI94LA322: Cessna 172N, N2105E, Boone, IA, September 11, 1994 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 11, 1994, 10:15 local (15:15 UTC) - Place: Boone, IA - Coordinates: 42.050159, -93.869049 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.0502&lon=-93.8690&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 6 uninjured - Status: Completed, report March 27, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 9676 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI94LA322 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9676/pdf - Page: https://openairdocs.org/ntsb/CHI94LA322 ## Probable cause (aircraft 2) the failure of both pilots to adequately monitor radio communications during an exceptionally busy period. Factors related to the accident were the high vegetation and the failure of airport personnel to recognize and correct a hazardous situation. ## Probable cause (aircraft 1) the failure of both pilots to adequately monitor radio communications during an exceptionally busy period. Factors related to the accident were the high vegetation and the failure of airport personnel to recognize and correct a hazardous situation. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, takeoff - roll/run - object - aircraft moving on ground - terrain condition - high vegetation (contributing factor) - unsafe/hazardous condition - not corrected, airport personnel (contributing factor) - monitoring - inadequate, pilot in command (cause) - monitoring - inadequate, pilot of other aircraft (cause) - On ground/water collision with object, takeoff - roll/run - object - aircraft moving on ground - terrain condition - high vegetation (contributing factor) - unsafe/hazardous condition - not corrected, airport personnel (contributing factor) - monitoring - inadequate, pilot in command (cause) - monitoring - inadequate, pilot of other aircraft (cause) ## Analysis (aircraft 2) THE TWO AIRPLANES COLLIDED WHILE ON TAKEOFF ROLL ON CROSSING RUNWAYS DURING A SUNDAY MORNING BREAKFAST FLY-IN. SEVERAL WITNESSES SAID THE AIRPORT WAS EXCEPTIONALLY BUSY THROUGHOUT THE MORNING DUE TO THE LARGE NUMBER OF TRANSIENT AIRCRAFT. WITNESSES IN AIRPLANES IN THE VICINITY REPORTED HEARING THE UNICOM DEPARTURE ANNOUNCEMENTS FROM BOTH PILOTS. NEITHER ACCIDENT PILOT ACKNOWLEDGED HEARING THE DEPARTURE ANNOUNCEMENT OF THE OTHER. IN THEIR ACCIDENT INVESTIGATION RECORD, FEDERAL AVIATION ADMINISTRATION INSPECTORS WROTE 'THE VIEW OF BOTH PILOTS WAS OBSTRUCTED BY CORN GROWING BETWEEN THE RUNWAYS.' ## Analysis (aircraft 1) THE TWO AIRPLANES COLLIDED WHILE ON TAKEOFF ROLL ON CROSSING RUNWAYS DURING A SUNDAY MORNING BREAKFAST FLY-IN. SEVERAL WITNESSES SAID THE AIRPORT WAS EXCEPTIONALLY BUSY THROUGHOUT THE MORNING DUE TO THE LARGE NUMBER OF TRANSIENT AIRCRAFT. WITNESSES IN AIRPLANES IN THE VICINITY REPORTED HEARING THE UNICOM DEPARTURE ANNOUNCEMENTS FROM BOTH PILOTS. NEITHER ACCIDENT PILOT ACKNOWLEDGED HEARING THE DEPARTURE ANNOUNCEMENT OF THE OTHER. IN THEIR ACCIDENT INVESTIGATION RECORD, FEDERAL AVIATION ADMINISTRATION INSPECTORS WROTE 'THE VIEW OF BOTH PILOTS WAS OBSTRUCTED BY CORN GROWING BETWEEN THE RUNWAYS.' ## Factual narrative (aircraft 2) See narrative on CHI94LA322A. ## Factual narrative (aircraft 1) On September 11, 1994, at 1015 central daylight time, a Cessna 172N, N2105E, was involved in an on-ground collision with a Piper PA-28-140, N2899T. The two airplanes were taking off at the Boone Municipal Airport, Boone, Iowa, in visual meteorological conditions. Both airplanes sustained substantial damage. N2105E was piloted by a commercial pilot. The pilot and one passenger reported no injuries. The personal flight was planned to Mason City, Iowa, and was conducted under 14 CFR Part 91. No flight plan was filed. N2899T was piloted by a private pilot. The pilot and three passengers reported no injuries. The personal flight was planned to Carroll, Iowa, and was conducted under 14 CFR Part 91. No flight plan was filed. The accident occurred during a Sunday Morning breakfast fly-in. Several witnesses said the airport was exceptionally busy throughout the morning due to the large number of transient aircraft. In his written statement, the pilot of N2105E reported that he taxied to the intersection of runway 14 and runway 20. He cleared for traffic and back taxied on runway 14. After waiting for four other aircraft to takeoff, he announced on unicom that he was "rolling on one four" and initiated the takeoff. The pilot reported that the tall corn between the two runways blocked his view and he did not see any traffic on runway 20 until the collision. The pilot of N2899T reported that there was a corn field obstructing the view from both thresholds. He cleared for traffic at the intersection of runway 14 and runway 20. He back taxied on runway 20. He conducted a run up, announced that he was taking off on runway 20, and initiated the takeoff. He said he was approaching rotation speed when he sighted the other airplane. He veered to the left side of the runway in an attempt to avoid the collision. He reported that the propeller from N2105E impacted the right wing of N2899T. Both airplanes spun around then the propeller from N2105E impacted the left wing of N2899T. Both airplanes slid to a stop. Witnesses in airplanes in the vicinity reported hearing the unicom departure announcements from both pilots. Neither accident pilot acknowledged hearing the departure announcement of the other. Photographs taken by Federal Aviation Administration (FAA) Inspectors show substantial tearing and crushing to the outer half of the right wing of N2899T. A four foot section of the mid-span leading edge of the left wing was crushed and torn back to the main wing spar. Photographs of N2105E show lateral crushing to the left cowling and door, a collapsed left lift strut and wing, and tearing to the left wing leading edge. The propellers of both airplanes exhibited minor bending and scraping. In their FAA Accident Investigation Record, FAA inspectors wrote "the view of both pilots was obstructed by corn growing between the runways." During a telephone interview on October 21, the Boone Airport Commissioner said he did not see the accident but he believed there was "no restriction of visibility between the two places where the planes were...the 172 didn't back taxi...he was following two planes that had already departed and was in a hurry." During a telephone interview, an inspector from the FAA Central Region Airports Division reported that his office would not normally conduct recurring inspections of a small municipal airport unless it was a "Part 139 airport." He said this type of recurring inspection was usually conducted by the state. At the request of the NTSB investigator, Mr. Don Long of the State of Iowa, Department of Transportation, Office of Aeronautics provided an airport inspection record dated June 17, 1994. Mr. Long noted that the corn between the two runways was probably not tall enough to impair visibility between the runways on the date of the inspection. Additionally, he commented that this was a common problem at many airports but he had no resolution because of the budgetary constraints on the airports and the agricultural income from the airport property. ## Aircraft 1 - Registration: [N2105E](https://openairdocs.org/deregistered/N2105E-2013-06-07), registration cancelled 2013-06-07, S/N 17271158, built 1978 (OpenAirDocs) - Reported make and model: CESSNA 172N - Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17271155 - Airframe hours: 5703 - Engines: LYCOMING O-320H 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Dwyer Aircraft Sales - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, August 10, 1994, 35 hours before - Departed: BNW - Destination: MCW, MASON CITY, IA - Airport: BNW, Boone Municipal, runway 14, 4,800 × 75 ft, concrete ## Aircraft 2 - Registration: [N2899T](https://openairdocs.org/aircraft/N2899T), registered now, S/N 28-7225276, built 1972 (OpenAirDocs) - Reported make and model: PIPER PA-28-140 - Registry model: [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140) (registry code 7102802) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 28-7225276 - Airframe hours: 3485 - Engines: LYCOMING O-320 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Carroll Aviation Inc. - Airworthiness certificate: Standard, Utility; Standard, Normal - Last inspection: Annual, March 3, 1994, 79 hours before - Departed: BNW - Destination: CIN, CARROLL, IA - Airport: BNW, Boone Municipal, runway 20, 3,300 × 290 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N2105E; age 66; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 1,904 total, 800 in this make and model, 1,904 as pilot in command - Pilot, aircraft N2899T; age 37; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 155 total, 98 in this make and model, 90 as pilot in command, 3 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 73 °F, dew point 64 °F - Altimeter: 30.00 inHg - Observed at: BNW ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19940911026071A](https://openairdocs.org/incident/19940911026071A), Sep 11, 1994: Cessna 172N, Boone, IA, Substantial damage. Collided with N2899T on takeoff at intersecting runways. Both on takeoff. Tall corn hid aircraft on other runway. - [Accident 19940911026072A](https://openairdocs.org/incident/19940911026072A), Sep 11, 1994: Piper PA28140, Boone, IA, Substantial damage. Collided with N2105E both on takeoff at intersecting runways. Corn hid aircraft on other runway. Call not heard. From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.